CN104675014B - Prefabricated steel fiber sludge ceramsite concrete wall and its construction method based on horse teeth connection - Google Patents

Abstract

The assembled steel fiber sludge Ceramsite Concrete Wall that the present invention is connected based on horse tooth trough, including：Prefabricated panel, its left and right side is provided with horse tooth trough structure, built-in horizontal reinforcement and vertical reinforcement；Cast-in-place connecting pole and cast-in-place vertical edges component, are connected with prefabricated panel by horse tooth trough structure bites, the built-in vertical muscle nested with horizontal reinforcement, form the attachment structure of horizontal direction prefabricated panel；Pre-buried welding plate, is embedded in the bottom surface of prefabricated panel, and in the vertical direction is connected with being arranged at the welding plate of concealed beam top surface by welding to be formed；Wherein prefabricated panel is made up of steel fibre sludge ceramsite concrete; present invention also offers the construction method of the assembled steel fiber sludge Ceramsite Concrete Wall connected based on horse tooth trough; the present invention by material, connected mode, form of reinforcement innovation, make the wall body structure have the advantages that with traditional assembled wall compared with energy-dissipating and shock-absorbing, ecological, environmental protective, quickly construction, it is economical and practical.

Description

Prefabricated steel fiber sludge ceramsite concrete wall based on horse-tooth connection and its construction work method

technical field

The invention belongs to the technical field of construction, and in particular relates to an assembled steel fiber sludge ceramsite concrete wall based on a horse-tooth connection and a construction method thereof.

Background technique

The prefabricated concrete structure meets the social requirements of resource conservation and environmental friendliness put forward in my country's "Twelfth Five-Year Plan", and is one of the effective ways to realize building energy conservation, emission reduction and housing industrialization. In recent years, the country's policy guidance and preferential policies for prefabricated housing have been introduced one after another. The prefabricated integral shear wall structure has been widely used in high-rise residential structures due to its good integrity, high rigidity, and high bearing capacity. At present, the development of prefabricated walls is facing many problems. On the one hand, the materials used in the walls are traditional concrete materials, which makes my country's energy and raw material consumption too large. Therefore, finding new ecological concrete wall materials has become an urgent problem to be solved. . On the other hand, the connection method of the traditional prefabricated shear wall structure needs to be further improved. The current connection method requires high prefabrication precision of components and takes a long time to install the holes, which greatly delays the construction period and increases the project cost. Therefore, it is necessary to The connection structure used in traditional prefabricated shear walls is improved, and a prefabricated wall connection structure with simple structure, reasonable design, convenient construction, low investment cost and good use effect is proposed. Finally, the structural integrity of the traditional prefabricated shear wall is poor, and the structural system lacks multiple fortification anti-seismic mechanisms. The failure of a single shear wall is mainly shear brittleness, which is difficult to meet the ductility design requirements of the structure. The reinforcement form of the force wall is optimized and innovated, and a prefabricated wall reinforcement form with good ductility, uniform energy-dissipating cracks, and excellent cooperative performance with vertical edge components is proposed.

Contents of the invention

In order to overcome the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a kind of assembly type steel fiber sludge ceramsite concrete wall body and its construction method based on the horse-tooth connection, through the innovation of material, connection mode and reinforcement form , so that the wall structure has the advantages of energy consumption and shock absorption, ecological environmental protection, rapid construction, economical and practical compared with traditional prefabricated walls.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A prefabricated steel fiber sludge ceramsite concrete wall based on horse-toothed connections, including:

Prefabricated wall panels 1, the left and right sides of which are provided with horse-toothed structures 13, built-in horizontal reinforcement bars 11 and vertical reinforcement bars 12;

The cast-in-place connecting column 2 is occlusally connected with the prefabricated wall panel 1 through the horse-tooth structure 13, and the longitudinal reinforcement is built in. The longitudinal reinforcement is nested with the horizontal reinforcement 11, and reliable anchoring is realized by spot welding at the joint, forming The connection structure of the prefabricated wall panel 1 in the horizontal direction;

The cast-in-place vertical edge member 5 is occluded and connected with the outer surface of the edge prefabricated wall panel 1 through the horse-tooth structure 13, and the longitudinal reinforcement is built in, and the longitudinal reinforcement is nested with the horizontal reinforcement 11, and a little Reliable anchoring is achieved by welding to form a connection structure of prefabricated wall panels 1 in the horizontal direction;

The pre-embedded welding plate 3 is embedded in the bottom surface of the prefabricated wall panel 1, and forms a connection structure by welding with the welding plate arranged on the top surface of the concealed beam in the vertical direction;

Wherein, the prefabricated wall panel 1 is made of steel fiber sludge ceramsite concrete, and the ratio of the steel fiber sludge ceramsite concrete is:

Each cubic meter of concrete contains: 70-117kg of steel fiber, 516kg of sludge ceramsite, 400kg of cement, 180kg of water and 819kg of sand.

The internal reinforcement form of the prefabricated wallboard 1 is optimized into a "field" shape, that is, two steel bars with a distance of 50 mm are arranged at each of the two ends of each of the upper, lower, left, and right sides, and the vertical and horizontal bars are arranged at the central position of the prefabricated wallboard 1. 4 steel bars with an interval of 50 mm are distributed horizontally and vertically inside the wallboard, of which 8 steel bars between the upper and lower sides form the horizontal steel bar 11, and 8 steel bars between the left and right sides form the vertical steel bar 12.

The present invention also provides the construction method of the assembled steel fiber sludge ceramsite concrete wall based on the horsetooth connection, comprising the following steps:

Step 1: Preparation of steel fiber sludge ceramsite concrete

Firstly, the steel fiber and sludge ceramsite are mixed and stirred so that the steel fiber is dispersed in the sludge ceramsite; then the obtained mixture is mixed with sand and cement, first dry mixing and then water mixing; the mixing time is the same as that of ordinary concrete; finally, the steel Fiber sludge ceramsite concrete;

Step 2: Prepare prefabricated wall panels 1

Firstly, assemble the steel formwork of the Ma Yacha structure 13, bind the steel mesh, bury the embedded welding plate 3, and then pour the steel fiber sludge ceramsite concrete to initially form the prefabricated wall panel 1; finally, standard maintenance for 1 to 2 days, remove the steel Formwork to form concrete wall panels with curbs;

Step 3: Integral pouring of the prefabricated wall

Wet the base of the wall first, lay the mortar at the bottom of the prefabricated wallboard 1; then adjust the positioning and seating of the prefabricated wallboard 1, in the vertical direction, the pre-embedded welding plate 3 is correspondingly welded, and the part without the welding plate is filled with dense mortar; in the horizontal direction Directionally, the cast-in-place connecting column 2 is arranged between the adjacent prefabricated wall panels 1 and is connected to the prefabricated wall panels 1 on both sides through the horse-tooth structure 13, and the cast-in-place vertical edge member 5 is arranged on the outside of the edge prefabricated wall panels 1 Connect with the prefabricated wall panel 1 at the edge through the horse-tooth structure 13, the exposed part of the horizontal steel bar 11 is nested with the cast-in-place connecting column 2 and the longitudinal bars in the cast-in-place vertical edge member 5, and the joints are spot-welded to achieve reliable anchoring , wherein, the horizontal reinforcement 11 in the uppermost prefabricated wall panel 1 is also nested with the longitudinal reinforcement of the constrained concealed beam, and is spot welded at the joint;

Finally, the formwork support of the cast-in-place connecting column 2 is carried out, and the steel fiber sludge ceramsite concrete is poured to form a prefabricated wall.

In the third step, when the strength of the prefabricated wall panel 1 reaches more than 75% of the design value, the construction can begin.

Compared with prior art, the beneficial effect of the present invention is:

1. The prefabricated wall of the present invention uses a new type of ecological concrete material, which can effectively alleviate the consumption of raw materials, and also solve the problem of recycling a part of urban waste.

2. Compared with the traditional connection method, the prefabricated wall of the present invention has the advantages of good integrity and good seismic performance, and can effectively solve the problems of the traditional prefabricated shear wall connection method, such as high prefabricated precision requirements for components, and installation problems. It takes a long time to drill holes, and the requirements for installation error control are high.

3. The prefabricated wall joints of the present invention are fast in construction, reliable in connection, and good in structural integrity. Its "Tian"-shaped reinforcement has good mechanical performance, energy dissipation and shock absorption, excellent ductility design, and reasonable use of materials.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention.

Fig. 2 is a schematic diagram of the prefabricated wall structure of the present invention.

Fig. 3 is a schematic diagram of the size and reinforcement structure of the prefabricated wallboard of the present invention.

Fig. 4 is a dimensional drawing of the wall body of the present invention.

detailed description

The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

As shown in Fig. 1 and Fig. 2, a kind of assembled type steel fiber sludge ceramsite concrete wall body based on the connection of horse teeth of the present invention comprises:

The prefabricated wallboard 1 is provided with a horse-toothed structure 13 on its left and right sides, and has a built-in horizontal steel bar 11 and a vertical steel bar 12 . As shown in Figure 2 and Figure 3, the internal reinforcement form of the prefabricated wall panel 1 is optimized into a "field" shape, that is, two steel bars with a distance of 50mm are arranged at each end of each of the four sides of the upper, lower, left, and right sides, and the prefabricated wall The central position of the board 1 is provided with 4 vertical and horizontal steel bars with an interval of 50mm, which are distributed in the wall panel. There are 8 steel bars between the upper and lower sides to form the horizontal steel bar 11, and a total of 8 steel bars between the left and right sides to form the vertical steel bar 12. "Tian"-shaped reinforcement has good mechanical performance, energy dissipation and shock absorption, and excellent ductility design. A preferred size parameter of the prefabricated wallboard 1 is: the thickness of the wallboard is 100mm, the height of the wallboard is 1320mm, the width of the wallboard is 950mm, a concrete protective layer with a thickness of 10mm is set on it, and the anchorage length of the vertical reinforcement 12 The distance between the outermost one of the vertical steel bars 12 and the outer edge of the concrete is 60 mm, and the anchorage length of the horizontal steel bars 11 is 215 mm.

The cast-in-place connecting column 2 is occluded with the prefabricated wall panel 1 through the horse teeth structure 13, and the longitudinal reinforcement is built in, and the longitudinal reinforcement and the horizontal reinforcement 11 are nested, and reliable anchoring is achieved by spot welding at the joints to form a horizontal prefabricated wall The connection structure of board 1;

The cast-in-place vertical edge member 5 is occluded and connected with the outer surface of the edge prefabricated wall panel 1 through the horse-tooth structure 13, and the longitudinal reinforcement is built in, and the longitudinal reinforcement is nested with the horizontal reinforcement 11, and a little Reliable anchoring is achieved by welding to form a connection structure of prefabricated wall panels 1 in the horizontal direction;

The pre-embedded welding plate 3 is buried on the upper and lower sides of the prefabricated wall panel 1, and the prefabricated wall panel 1 is welded by the pre-embedded welding plate 3 to form a connection structure in the vertical direction;

Set the cast-in-place constrained hidden beam 6 and the cast-in-place floor slab or laminated floor 4 above the prefabricated wall panel 1, the cast-in-place constrained concealed beam 6 and the cast-in-place floor slab or laminated floor 4 are provided with transverse ribs, and the prefabricated wall panel 1 The vertical steel bars are nested and spot welded at the joints to achieve reliable anchoring.

Among them, the prefabricated wall panel 1 is made of steel fiber sludge ceramsite concrete. Steel fiber sludge ceramsite concrete is a new type of ecological material. It has light weight, thermal insulation, good fire resistance, good corrosion resistance, and earthquake resistance. Good performance and other characteristics. The ratio of steel fiber sludge ceramsite concrete is:

Each cubic meter of concrete contains: 70-117kg of steel fiber, 516kg of sludge ceramsite, 400kg of cement, 180kg of water and 819kg of sand. The sludge ceramsite used is taken from urban sewer sludge, which is used to replace clay, and is made by dredging, natural drying, raw material into balls, preheating, roasting, and cooling.

The present invention also provides the construction method of the fabricated steel fiber sludge ceramsite concrete wall based on the horse teeth connection, including:

Step 1: preparing steel fiber sludge ceramsite concrete, including the following steps:

Step 1, preparing sludge ceramsite, specifically as follows:

Step 1.1, obtaining raw sludge and dehydrating and drying it, the raw sludge can come from municipal sewer sludge;

Step 1.2, grinding and homogenizing the dehydrated and dried sludge;

Step 1.3: Squeeze the homogenized sludge into balls and send it to the ceramsite rotary kiln for firing. The process conditions are firstly preheated at 400°C for 20 minutes, then heated to 1000°C for 20 minutes, and finally cooled naturally in the air;

In step 1.4, the fired ceramsite is cooled and classified and screened, and ceramsite with a particle size of 5-20 mm is used as a raw material.

Step 2, mix and stir the steel fiber and sludge ceramsite according to the aforementioned ratio so that the steel fiber is dispersed in the sludge ceramsite. In order to make the steel fiber evenly distributed in the concrete, first put the steel fiber and sludge ceramsite into the mixing Mix by machine for 30 seconds, so that the steel fibers are dispersed in the sludge ceramsite without being united;

Step 3, mix sand and cement with the mixture obtained in step 2, first dry stir for 30 seconds, then add water to the rotating mixer, and stir for about 3 minutes;

Step 4, putting the stirred steel fiber sludge ceramsite into the mold for molding;

Step 5, put the formed steel fiber sludge ceramsite concrete into a standard curing room for curing, and the curing method and time are the same as those of ordinary concrete.

Among them, seawater and sea sand are not allowed, and the addition of chlorinated salt is strictly prohibited. Since sludge ceramsite belongs to light aggregate, try to use a lower water-cement ratio when configuring, and try to be less than 0.5. In addition to the above regulations, other materials used in steel fiber sludge concrete shall comply with the regulations on raw materials used in reinforced concrete in the current code.

Step 2: Prepare prefabricated wall panels 1

First assemble the steel formwork of the Ma Yacha structure 13, tie the steel mesh, bury the embedded welding plate 3, and then pour the steel fiber sludge ceramsite concrete to form the prefabricated wall panel 1; finally, standard maintenance 1~2d, dismantle the steel Formwork to form concrete wall panels with curbs;

Step 3: Integral pouring of the prefabricated wall

Wet the base of the wall first, lay the mortar at the bottom of the prefabricated wallboard 1; then adjust the positioning and seating of the prefabricated wallboard 1, in the vertical direction, the pre-embedded welding plate 3 is correspondingly welded, and the part without the welding plate is filled with dense mortar; in the horizontal direction Directionally, the cast-in-place connecting column 2 is arranged between the adjacent prefabricated wall panels 1 and is connected to the prefabricated wall panels 1 on both sides through the horse-tooth structure 13, and the cast-in-place vertical edge member 5 is arranged on the outside of the edge prefabricated wall panels 1 Connect with the prefabricated wall panel 1 at the edge through the horse-tooth structure 13, the exposed part of the horizontal steel bar 11 is nested with the cast-in-place connecting column 2 and the longitudinal bars in the cast-in-place vertical edge member 5, and the joints are spot-welded to achieve reliable anchoring , wherein, the horizontal reinforcement 11 in the uppermost prefabricated wall panel 1 is also nested with the longitudinal reinforcement of the constrained concealed beam, and is spot welded at the joint;

As shown in Figure 4, the obtained wall size parameters are: the distance from the top of the bottom beam to the bottom of the concealed beam is 1350mm; the height of the concealed beam is 200mm; the width of the cast-in-place connecting column 2 is 200mm; the width of the wall is 1400mm; 2 The distance between the inner concrete skin and the outermost reinforcement of the wall panel is 85mm. The structure not only meets the use requirements of conventional civil buildings, but also has high bearing capacity and good seismic performance; it can realize large-scale production of wallboards, and is conducive to the realization of building industrialization.

Claims (2)

1. a kind of construction method of the assembled steel fiber sludge Ceramsite Concrete Wall connected based on horse tooth trough, the wall bag Include：

Prefabricated panel (1), its left and right side is provided with horse tooth trough structure (13), built-in horizontal reinforcement (11) and vertical reinforcement (12)；

Cast-in-place connecting pole (2), is connected with prefabricated panel (1) by the horse tooth trough structure (13), built-in vertical muscle, described vertical Muscle is nested with horizontal reinforcement (11), and in junction, reliable anchoring is realized in spot welding one by one, forms horizontal direction prefabricated panel (1) Attachment structure；

Cast-in-place vertical edges component (5), horse tooth trough structure (13) company of occlusion is passed through with the lateral surface of edge prefabricated panel (1) Connect, built-in vertical muscle, the vertical muscle is nested with horizontal reinforcement (11), and in junction, reliable anchoring is realized in spot welding one by one, forms water Square to prefabricated panel (1) attachment structure；

Pre-buried welding plate (3), is embedded in the bottom surface of prefabricated panel (1), and in the vertical direction leads to being arranged at the welding plate of concealed beam top surface Cross welding and form attachment structure；

Wherein, the prefabricated panel (1) is made up of steel fibre sludge ceramsite concrete, the steel fibre sludge ceramsite concrete Match and be：

By 70~117kg of steel fibre, sludge ceramsite 516kg, cement 400kg, water 180kg and sand in per cubic meter of concrete 819kg is constituted；

The internal form of reinforcement of the prefabricated panel (1) is optimized for sphere of movements for the elephants shape, i.e.,：Two ends in each four faces up and down are each If two spacing 50mm reinforcing bar, but prefabricated panel (1) middle position set in length and breadth it is each 4 interval 50mm reinforcing bar, anyhow Cross-distribution is inside wallboard, and totally 8 reinforcing bars constitute between horizontal reinforcement (11), left and right two sides totally 8 wherein between upper and lower surface Root reinforcing bar constitutes vertical reinforcement (12)；The wallboard thickness of the prefabricated panel (1) is 100mm, and wall-plate level is 1320mm, wallboard Width is 950mm, and the concrete cover that thickness is 10mm is set thereon, and the anchorage length of the vertical reinforcement (12) is 190mm, outermost one of vertical reinforcement (12) is 60mm to concrete jacket spacing, and the anchorage length of horizontal reinforcement (11) is 215mm；

Characterized in that,

Construction method comprises the following steps：

Step one：Prepare steel fibre sludge ceramsite concrete

First mixing steel fibre and sludge ceramsite causes steel fibre to be dispersed in sludge ceramsite；Again by obtained mixture With sand and cement mixing, first do stirring and add water stirring；Mixing time is consistent with normal concrete；Finally obtain steel fibre sludge Haydite concrete；

Step 2：Prepare prefabricated panel (1)

The steel form of assembling horse tooth trough structure (13), assembling reinforcement mesh sheet, bury pre-buried welding plate (3), then use steel fibre first Sludge ceramsite concreting, preliminarily forms prefabricated panel (1)；1~2d of last standard curing, removes steel form, forms band horse The concrete panel of tooth raft；

Step 3：Assembled wall one-piece casting

Wetting wall base ground, lays prefabricated panel (1) bottom mortar first；Then adjustment prefabricated panel (1) is positioned and in place, On vertical direction, pre-buried welding plate (3) correspondence is welded, the closely knit mortar of solderless plate portion position filling；In the horizontal direction, cast-in-place connecting pole (2) it is arranged between adjacent prefabricated panel (1) and is connected by horse tooth trough structure (13) with both sides prefabricated panel (1), it is cast-in-place perpendicular Prefabricated panel (1) by horse tooth trough structure (13) and edge is arranged on the outside of the prefabricated panel (1) at edge to edge member (5) Connection, the exposed parts of horizontal reinforcement (11) are nested with indulging muscle in cast-in-place connecting pole (2) and cast-in-place vertical edges component (5), Reliable anchoring is realized in spot welding one by one for junction, wherein, the horizontal reinforcement (11) in the prefabricated panel (1) of the top is also dark with constraint Beam indulges muscle nesting, and in junction spot welding one by one；

The template support of cast-in-place connecting pole (2) is finally carried out, and pours steel fibre sludge ceramsite concrete, assembled wall is formed Body.

2. the construction party of the assembled steel fiber sludge Ceramsite Concrete Wall connected according to claim 1 based on horse tooth trough Method, it is characterised in that in the step 3, the intensity of prefabricated panel (1) reaches can be applied during more than the 75% of design load Work.